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Tyre Pressure
PandA wrote:
Hi all I'm sure this has been asked before, but I couldn't find any questions in the previous posts about it. I have a pretty crappy touring bike (Repco Traveller), on the tyres it says that the max PSI is 85. I usually use a hand pump which gets me no where near this, but since I am essentially lazy, have taken it to the local servo to use their compressor. Should I be filling the tyre to the max 85 PSI (will this cause harm to the tyre, e.g. more likely to puncture?), or to something lower (about 40 is what I can get with the hand pump) I have tried consulting web sites on bicycle maintenance but they seem to talk of putting 120PSI in. My tyres must be pretty crappy to match the bike to have a low max.... Anyhow, your suggestions are appreciated. Andrew. At 40psi your are more likely to get punctures, especially ones caused by running over objects and pinching the tube against the rim. 75-85 would be much safer. It will prevent the tyre roling off the rim during tight/fast cornering. That said, if the tyres are stuffed, get new ones. Peter -- Peter McCallum Mackay Qld AUSTRALIA |
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#2
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Tyre Pressure
Hi all
I'm sure this has been asked before, but I couldn't find any questions in the previous posts about it. I have a pretty crappy touring bike (Repco Traveller), on the tyres it says that the max PSI is 85. I usually use a hand pump which gets me no where near this, but since I am essentially lazy, have taken it to the local servo to use their compressor. Should I be filling the tyre to the max 85 PSI (will this cause harm to the tyre, e.g. more likely to puncture?), or to something lower (about 40 is what I can get with the hand pump) I have tried consulting web sites on bicycle maintenance but they seem to talk of putting 120PSI in. My tyres must be pretty crappy to match the bike to have a low max.... Anyhow, your suggestions are appreciated. Andrew. |
#3
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Tyre Pressure
On Fri, 27 May 2005 at 01:17 GMT, PandA (aka Bruce)
was almost, but not quite, entirely unlike tea: Should I be filling the tyre to the max 85 PSI (will this cause harm to the tyre, e.g. more likely to puncture?), or to something lower (about 40 is what I can get with the hand pump) I have tried consulting web sites on bicycle maintenance but they seem to talk of putting 120PSI in. My tyres must be pretty crappy to match the bike to have a low max.... 120 is for road bikes. The 85 limit is more like a touring bike (1.5"). Some mountain bike tires are far lower. I can barely get 40 with my hand pump - quite dissapointed after seeing the performance of a couple of the tiny hand pumps on the BR rides. Foot pump gets me up to the necessary 70 on my thicker touring tires, and 90 or so on the thinner tire. My foot pump doesn't have a guage though, so I have to rip the pump off, and then apply my hand pump with guage, and quickly release it once I have read the guage, before too much air has escaped. I found when I first decided to pump one of my tires up to its limit, I got a flat very quickly. Taking a look at the tire, I realised the canvas was showing through - definitely a sign to replace the tire. The only time you should get a flat (or blowout) when pumping up to the limit, is when the tire is too old, and when the outside temperature is so hot that the air inside the tube has increased pressure significantly. -- TimC -- http://astronomy.swin.edu.au/staff/tconnors/ Like most computer techie people, I'll happily spend 6 hours trying to figure out how to do a 3 hour job in 10 minutes. --Rev. James Cort, ASR |
#4
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Tyre Pressure
TimC wrote:
I found when I first decided to pump one of my tires up to its limit, I got a flat very quickly. Taking a look at the tire, I realised the canvas was showing through - definitely a sign to replace the tire. The only time you should get a flat (or blowout) when pumping up to the limit, is when the tire is too old, and when the outside temperature is so hot that the air inside the tube has increased pressure significantly. I've found that running very high pressures (110-120psi) increase my chances of getting punctures from glass intrusion... Lower pressures (~100psi) seems to allow the tyre to deform around the glass (or similar sharp object), rather than holding it's shape and allowing the sharp edge to cut through the case YMMV -- BrettS |
#5
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Tyre Pressure
For my MTB commute I go hard but stay 10% shy of max. Hard tyres save punctures as the tyre surface is pretty stiff & can deflect some pesk hole inducing debis. For my dirt MTB the tyres are rated up to 80psi, but I find tha 45-50psi is best for handling & traction. higher psi offroad makes i bounce all over the shop (hardtail),l not sure about pinch-flats as have not expereinced any -- Marx SS |
#6
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Tyre Pressure
How cool - my first ever 'road bike' was a Repco Traveller, saved up my
pocket money and part-time wages for ages to get it. Had those groovy 'brake lever extensions' across the handlebars so you could still brake while riding 'upright'. Aaah, the memories... Absent Husband |
#7
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Tyre Pressure
"Marx SS" wrote in message ... For my MTB commute I go hard but stay 10% shy of max. Waaay to much information! And stop bragging anyway. :-) Cheers Peter |
#8
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Tyre Pressure
Peter Signorini wrote:
"Marx SS" wrote in message ... For my MTB commute I go hard but stay 10% shy of max. Waaay to much information! And stop bragging anyway. :-) Cheers Peter ****, we're verging on aus.brothel now! |
#9
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Tyre Pressure
"Tamyka Bell" wrote in message ... Peter Signorini wrote: "Marx SS" wrote in message ... For my MTB commute I go hard but stay 10% shy of max. Waaay to much information! And stop bragging anyway. :-) Cheers Peter ****, we're verging on aus.brothel now! It's one of those days, I suppose. Winter is upon us and with it, the urge to snuggle. Snuggle is a word with a potentially broad spectrum of use too, before anyone say anything. |
#10
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Tyre Pressure and groovy 'brake lever extensions'
"Absent Husband" wrote in
oups.com: How cool - my first ever 'road bike' was a Repco Traveller, saved up my pocket money and part-time wages for ages to get it. Had those groovy 'brake lever extensions' across the handlebars so you could still brake while riding 'upright'. Aaah, the memories... Absent Husband Anyone know if you can still get brake levers with those groovy 'brake lever extensions'? I'd really like a set for a little project I have (restoring my first 10 speed). Cheers BrettM |
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